Which of the following was a direct result of the Opium Wars? O China's decline in the nineteenth century
O China's autonomy in world trade
O China's independence by the end of the nineteenth century
China's continued isolation from the rest of the world

China's decline in the nineteenth century

Explanation:

Opium wars was start of Century of Humiliation, China was forcefully moved from protectionist policy to free trade policy by British imperialist menace, Hong Kong wrongfully leased, and China's invincibility shattered. Imperialist from all side invaded to seize ports, Russia, France, Germany, Britain even more, Austro-Hungarians briefly on small scale. It was very uncool sad time.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)